Welcome to HealthcareMagic forum.
First let me assure you that the nasal bleeding
has nothing to do with concussion
Nose bleeding occur due to local trauma - nose pinching or probably as a result of excessive dryness or due to systemic cause such as high blood pressure
, side effects of drugs like aspirin
and anticoagulants. Bleeding and coagulation disorder are rarer causes.
Get your blood pressures checked and if it is normal, then cause is probably local factors including the nasal dryness associated with chlorination.
Hope this answers your query.